| http://www.w3.org/ns/prov#value | - The sales terminals of this invention are linked to a computerized airline reservation system. [0013] U.S. Pat. No. 6,014,644 entitled ???Centrally Coordinated Communication Systems With Multiple Broadcast Data Objects and Response Tracking??? which issued on Jan. 11, 2000 to Erickson discloses a system for facilitating communication between buyers and sellers including a message and response trac
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